<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<form action="" method="post">

    姓名 <input type="text" name="name">
    年龄 <input type="text" name="age">
    <input type="submit">
</form>

<p>{{ timer }}</p>

</body>
</html>